Amplifiers are a crucial part of a well-balanced sound system. Too little power and it can cause your speakers to distort and blow or put additional stress on your amplifier that can cause it to overheat and shut down. Too much power and you can cause damage to your speakers' cones and mechanical parts, causing them to blow as well. Finding a good match for your speakers and subwoofers is key, here's how you do it.
Max (Peak) Vs RMS Power
Lets start by going over speakers and amplifier ratings and what they mean.
The difference between “Peak Power” and “RMS Power” is simple, so don't let it confuse you. RMS Power is a measure of the amplifier's continuous power. It's the realistic amount of power that the amplifier is rated for. It's more of an average of the wattage output over a set amount of time. Peak Power can best be described as the “peak” amount of power that the amplifier can generate or handle in a very short amount of time, a burst. It is not the amount of power the amplifier emits on a continuous basis, but more of a quick burst.
Even though the Peak Power ratings are marketed by speaker and amplifier manufacturers to catch the eyes of consumers, it is not the Peak Power, but the RMS Power that you want to use as a tool to match the right speaker with the right amplifier.
Matching an Amplifier With a Speaker
Now that you know an amplifier's RMS Power rating is a more accurate measurement of the power output, you can use it as a tool to correctly match it to the speaker(s) and subwoofers you want to use. You will want to match the RMS rating of the amplifier to the RMS rating of the speaker or subwoofer. The closer these two numbers are to eachother, the better match you have. For example, if an amplifier has an output of 100 watts x 4 channels RMS, this will mean that you want a speaker that has a 100 watt RMS rating (or in this case 4 speakers with a 100 watt rating). Same goes with a subwoofer.
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